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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 ( Mark One ) ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 FORM 10 - K For the transition period from Delaware ( State or other jurisdiction of incorporation or organization ) DCP MIDSTREAM , LP ( Exact name of registrant as specified in its charter ) 370 17th Street , Suite 2500 Denver , Colorado ( Address of principal executive offices ) to Commission File Number : 001-32678 Registrant's telephone number , including area code : ( 303 ) 595-3331 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) Title of Each Class : Common Units Representing Limited Partner Interests 7.875 % Series B Fixed - to - Floating Rate Cumulative Redeemable Perpetual Preferred Units 7.95 % Series C Fixed - to - Floating Rate Cumulative Redeemable Perpetual Preferred Units DCP DCP PRB DCP PRC Securities registered pursuant to Section 12 ( g ) of the Act : None . 03-0567133 ( I.R.S. Employer Identification No. ) Name of Each Exchange on Which Registered : New York Stock Exchange 1 80202 ( Zip Code ) Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Exchange Act of 1934 , or the Act . Yes ý No " Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes " No ý Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Act during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes ý No ™ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit and such files ) . Yes ý No Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes New York Stock Exchange New York Stock Exchange Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer ý Accelerated filer Non - accelerated filer Smaller reporting company Emerging growth company If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal controls over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 762 ( b ) ) by the registered public accounting firm that prepared or issued its audit report ý No ý